Your Mac’s thermal sensors are monitored by a sub-system named Core Duet, which together with the SMC manages its internal environment and services. kernel_task isn’t causing the thermal problem, it’s part of your Mac’s response to it.
#Menumeters windows pro#
In the example quoted above, the cause is in a thermal sensor placed by the left USB-C ports in many MacBook Pro models. High CPU load by kernel_task often means that your Mac is getting too hot somewhere, or is at risk of heating up.
Why is that, and what should you do about it? So, your Mac goes all sluggish, you open Activity Monitor, and there at the top of the CPU list is kernel_task, taking 100% or more. As the significance of this cardinal sign hasn’t been recognised by many expert users, and the warmer weather is drawing near, now is the time to remind ourselves what kernel_task does, and what this means. One key feature mentioned here is that users who have this problem have noticed that a process named kernel_task has also been consuming almost all the CPU, as shown in Activity Monitor. There’s been a recent resurgence of interest in an old thread elsewhere about MacBook Pro models overheating when being charged and connected to external devices using the USB-C ports on their left side alone.
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